Where does “-quam” come from?

-quam (Latin) comes from Latin quam, from Proto-Italic kʷoi, from Proto-Indo-European kʷós — who.

Ancestry of “-quam”, step by step

Step	Language	Word	Meaning
1	Latin	quam	in what way, to what degree; how, how much, as...
2	Proto-Italic	kʷoi	who, what
3	Proto-Indo-European	kʷós	who

-quam — Etymology, Origin & Word History | Etymology Explorer